Collet stop



FIG. 1 is a left perspective view of a collet stop showing my new design;

FIG. 2 is a right perspective view thereof;

FIG. 3 is a top elevational view thereof;

FIG. 4 is a bottom elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a right elevational view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a back elevational view thereof. 

CLAIM The ornamental design for a collet stop, as shown and described. 